Pedipalpi :: Pedipalpi (n pl.) A division of Arachnida, including the whip scorpions (Thelyphonus) and allied forms. Sometimes used in a wider sense to include also the true scorpions..
Pedipalpous :: Pedipalpous (a.) Pertaining to, or resembling, the pedipalps..
Pedipalpus :: Pedipalpus (n.) One of the second pair of mouth organs of arachnids. In some they are leglike, but in others, as the scorpion, they terminate in a claw..